＜On Saturday afternoon＞
 Emily: Rose. It's 1:00 p.m. Time   31   the piano lesson.
Rose: Oh. The piano lesson is at 1:30 p.m. We still have   32     .
 Emily: How about eating something first? There is a new restaurantnear here. It's on me. (我請客)Rose : No, thanks. I have a lunchbox with me.
 Emily : Who   33   the lunchbox for you every day?
 Rose: My mom   34      . She loves cooking.
 Emily: She is really nice.
 Rose : You bet! By the way, there is a club meeting on Septembernineteenth . Do you want to come?Emily: Sorry. I have a math test two days away from that day. Ihave to prepare for it. And I am busy studying every day.Aren't you busy?
Rose: No,   35     . I usually   36   online all night, and playcomputer games every weekend.
Emily : I envy you. My mom always asks me to study atdesk all night. She only cares about my grades. I can't   37       my own interests(興趣). Moreover, I can use mycellphone only once a week.
Rose : Poor you. Why not eat the lunchbox with me. Let's share it.
Emily : Thanks! You are really my good friend. How sweet!
【題組】31.
(A) for
(B) in
(C) on
(D) at